Furnace.



P TED SEPT. 24, 1907. RAY & J. 0. JE U 8 SHEETS-SHEET 1.

R. G. HEMING YE GE.

'APPLIGATIOI 4119.20, 100a I. I I

(PATENT-ED SEPT. 24. 1907. JBIYSBN.

ITO-866,787.

R. G. HEMINGRAY. & J. 0.

FURNACE. APPLICATION FILED AUG. 20,1906.

3 SHEETB-SHEET 2.

MN\ 4 F. i

ATTORNEY Parnrrr OFFICE.

RALPH G. IIEMINGRAY, OF MUNGIE,

INDIANA, AND JOHN O. JENSEN, OF ROCHESTER, NEW YORK.

FURNACE Specification of Letters Patent.

Patented Sept. 24, 1907.

Application filed August 20, 1906. Serial No. 381,403.

To all whom it may concern: I

Be it known that we, RALPH G. HEMINGRAY and JOHN O. JENSEN, citizens ofthe United States, residing at the cities of Muncie, in the county ofDelaware and State of Indiana, and Rochester, in the county of Monroeand State of New York, respectively, have invented a new and usefulFurnace, of which the following is a specification.

Our invention relates to improvements in furnaces wherein vaporized fuelis employed, such as artificial or producer gas.

In furnaces of this character as at present devised, the combustionobtained is so imperfect that quantities of the fuel consumed, arewasted and lost, and great difliculty is experienced in the generationand maintenance of a degree of heat of high efficiency.

The objects of our invention are to provide facilities in a furnace ofthis kind whereby the maximum degree of efficiency of the fuel consumedmay be utilized and the waste of the same prevented, and whereby themaximum degree of heat possible to be obtained by the expenditure of agiven amount of the fuel may be quickly generated and fully and equablymaintained. These and other objects which will become apparent as thespecification of our invention is disclosed are accomplished by the newand novel construction and arrangement of parts as shown in thefollowing description, pointed out in the claims, and illustrated intheaccompanying drawings.

In the disclosure herein of our invention we have shown our furnaceadapted to the heating of an ordiapplicable to use for the heating ofboilers of the watertube type, as well as for the type of boiler asherein shown, and for any purpose, in fact, where it is desired togenerate, through the medium of vaporized fuel, such as producer gas, auniform and intense heat in a short time, and to maintain the sameequable and without waste of fuel, or loss of its efficiency.

In the drawings, similar letters of reference refer to similar partsthroughout the several views, in which Figure 1 is a vertical centrallongitudinal section of our improved furnace showing the boiler, thebaffles, and the gas-valve in elevation; Fig. 2 is a transversesectional view on the line 2--2 Fig. 1; Fig. 3 is a transverse sectionalview on the line 33 Fig. 1; and Fig, 4 is a top plan sectional view onthe line 44 Fig.1.

The features of our invention reside in the introduction at the rear ofthe furnace, of gas direct from the producer, through a conduit of suchstructure and length that it will become heated and retain in itself ahigh degree of heat, and then the baflling of such gas at its entry intothe furnace proper and as it is ignited; also such construction andarrangement of the parts of the furnace that by the radiation of theheat therefrom the oxygen to be mixed with the consuming gas will besufficiently primarily heated so that such perfect combination of thegas therewith will be effected that the maximum degree of heat andcombustion will be obtained in the chamber or part of the furnaceintended therefor'and its dissipation or emanation, before its escape toand about the object to be heated, will be prevented.

A designates the rear, B the front, and O and D the side walls, and Ethe top of the furnace, built up of ordinary iire brick, and withinwhich the boiler is supported. F designates suitable base. 7

Extending rearwardly to and within a proper distance from the rear wallA andtransversely completely across the width of the furnace, is thefloor G constructed of fire brick and supported on the sheet metal plateG overlaying and resting upon the cross-beams H. Extending forwardlyfrom the rear Wall and to Within a proper distance from the front Wallis the continuous arch I, as plainly shown in Fig. 1 and Fig. 2. Jdesignates a conduit which may be of any suitable shape in crosssection, and which we designate as being constructed of a metallic pipeor cylinder lined with fire brick or other refractory material; thisconduit is arranged so as to pass through the rear wall of the furnaceand to extend forwardly to within a given distance short of the fulllength of the arch I. The frontal end of this conduit is supported inthe transverse wall K which rests on the floor G, being continuous andclosed underneath and which terminates on a line with the top of theconduit, as shown in Fig. 1 and Fig. 2. The rear end of this conduit iscommunicatingly connected directly with the discharge pipe of the gasproducer, at which connection is provided the suitable valve J wherebythe quantity of gas to be fed into the conduit may be varied orcontrolled.

Formed integrally with the frontal portion of the arch I and obliquelydisposed thereto is the baffle-arch L, and extending obliquelytransversely from the side walls are the baffle walls M; these slantingwalls and slanting roof form the funnel-shaped chamber N whichcommunicates with the combustion chamber O, the function of the roof Lbeing to impel downwardly the products of combustion and the heatgenerated thereby,

whereby the heat of the floor of the combustion chamber is accentuated,the air current thereunder being in turn heated thereby primarily ashereinafter described. P and Q designate suitable openings in the wall Bprovided with doors, the functions of which openings will be hereinafterdisclosed.

Occupying the space beneath the floor G and from the front wall to thechamber R, and also occupying the space about the conduit J from therear end of the floor G forwardly to within a proper distance from thewall K are the transversely and longitudinally extending lines of firebrick baffles S and T respectively, commonly known as checker work,forming a succession of pasgage ways through which percolates thecurrent of oxygen admitted through the opening P and which combines ormerges with the gas in the chamber N and chamber 0 where the combustionof the gas and the oxygen is effectively ascomplished.

In the operation of our invention, fagots are introduced into thechamber 0 through the opening Q and kindled; the valve J is then openedwhereby the gas from the producer is introduced through the conduitJ andwhich promptly ignites at the chamber N. The gas as produced andadmitted into the conduit having an initial high degree of heat, theconduit readily becomes heated; as the consumption of the gas continues,and as the heat intensifies, a draft of the oxygen through the opening Pis induced. The floor G having become heated, the oxygen proceedingtoward the rear of the furnace underneath the floor, in turn becomeswarmed, the baffles S retarding the progress of the current sufficientlyso that the maximum degree of heat afforded by the floor and baffles maybe accumulated by the current reaching the chamber R where it ascendsinto the chamber surrounding the heated conduit J, and is againretarded, by the baffles T. The current at this stage of its progressbeing already heated to a high degree of temperature, rapidly becomesheated to a higher de gree as in its draft forwardly immediately underthe arch I it accumulates additional heat from the radiating heat ofsaid arch, whence it proceeds to the chamber N immediately in front ofthe mouth of the conduit 3'. At this point the highly heated current,is, by the converging walls and arch drawn irresistibly and per fectlyinto combination with the gas emitting from the conduit, whence theproducts of combustion proceed into the chamber O where the thoroughcombustion of the completely combined elements, occurs.

The arch I, in its portion above the conduit J, having become heated toa high degree, besides transmitting great heat to the current of airpassing forwardly thereunder, radiates great heat upwardly sustainingthe high degree of heat of the furnace passing from the chamber .0 tothe object to be heated, and to the rear of the furnace. The function ofthe forwardly extending portion of the arch I is the prevention of theascent or escape from the combustion chamber of the products ofcombustion, until the combustion is practically completed. By thisingenious construction and arrangement of parts the heat radiated by thefloor and the arch of the furnace and by the conduit J is so utilized,that the oxygen passing into the furnace and later to be combined withthe gas, is thoroughly heated before such combination takes place, thusthe efficiency of the gas is not lessened or encroached upon in theprocess of combustion. This manner of conveying and introducing into thefurnace of the producer gas and the oxygen or air, whereby theoccurrence of cold or underheated drafts of air or gas, at the combiningor mixing aperture and at the combustion chamber, is prevented, is oneof the important featin'es of our invention, the maximum degree of theefficiency of the fuel consumed being wholly conserved and utilized.

What we claim as our invention, and desire to scene by Letters Patent,is

1. In a furnace, the combination with the boiler, of a combustionchamber under the front portion of the boiler, a horizontally disposedplate under the rear portion of the said boiler and separate therefromto leave a passage-way between said plate and boiler, the forward end ofthe said plate extending over the rear portion of the said combustionchamber, a mixing chamber at the rear of the combustion chamber with itstop inclining downward from said plate towards said combustion chamber,a producer gas conduit extending through the rear portion of saidfurnace below said plate and to said mixing chamber, and a ballled airpassage-way, surrounding said conduit and under said plate with an inletin the rear portion of the furnace, substanitally as set forth.

2. In a furnace, the combination with a boiler, of a combustion chamberunder the front portion of the boiler a horizontally disposed plateunder the rear portion of said boiler and separate therefrom to leave apassage-way between said plate and the boiler, the forward end of saidplate extending over the rear portion of said combustion chamber, amixing; chamber at the rear of the combustion chamber with its topinclining downward from said plate towards said combustion chamber, aproducer-gas conduit extending through the rear portion of said furnacebelow said plate and to said mixing chamber, a ballled air pas sage-waysurrounding said conduit and under said plate with the inlet to saidpassage-way in the rear portion of the furnace, a wall at the dischargeend of said conduit closing' the lower portion of said air passage wayso that the air will be required to pass over said wall and in contactwith said plate above.

3. In a furnace, the combination with a boiler, of a combustion chamberunder the front portion of the boiler, a horizontally disposed plateunder the rear portion of the said boiler and separate therefor-m toleave a passageway between said plate and the boiler, the forward end ofsaid plate extending over the rear portion of said combustion chamber, amixing chamber at the rear of the combustion chamber with its topinclining downward from the plate and its walls slanted toward eachother and towards said combustion chamber, a producer-gas conduitextending through the rear portion of said furnace below said plate andto the said mixing chamber, a baliled air passageway surrounding saidconduit and under said plate with the inlet to said passageway in therear portion of the furnace, a wall at the discharge end of said conduitclosing the lower portion of said air passageway so that the air will berequired to pass over said wall and in contact with said plate above.

4. In a furnace, the combination with a boiler, of a combustion chamberunder the front portion of the boiler, a horizontally disposed plateunder the rear portion of the said boiler and separate therefrom toleave a passageway between the said plate and the boiler, the forwardend of said plate extending over the rear portion of said combustionchamber, a mixing chamber at the rear of the combustion chamber with itstop inclining downward from the plate and its walls slanted toward eachother and towards said combustion chamber, a producer-gas conduitextending through the rear portion of said furnace below said plate andto the said mixing chamber, a bailled air passageway surrounding saidconduit and under said plate with the inlet to said passageway in therear portion of the furnace, a wall at the discharge end of said conduitclosing the lower portion 01 said air-passageway so that the air will berequired to pass over said wall and in con tact with said plate above,and a horizontally disposed plate extending from the front of thefurnace under the combustion chamber and under said passagewaysurrounding the producer-gas conduit, and a baflled air passageway undersaid last mentioned plate with an inlet at the front end of the furnaceand an outlet therefrom at the rear of

